Home Postcode finder QLD Wyaga Wyaga postcode QLD Wyaga is a locality in Queensland covered by postcode 4390. Postcode 4390 State or territory Queensland (QLD) Region Toowoomba Region Add a free Wyaga business listing Be the first listing in Wyaga Common questionsWhat is the postcode for Wyaga?Wyaga, QLD has the postcode 4390.What state is Wyaga in?Wyaga is in Queensland (QLD).Does postcode 4390 cover more than one suburb?Yes. Postcode 4390 covers 10 localities, so the postcode alone does not identify Wyaga. Browse other postcodes in Queensland, or widen the search to every Australian postcode.